Usually anything starting with AM_ is meant to be used
as a message type indicator, to stick in TOS_Msg.type
The values are arbitrary, and there is no master
dictionary of types.
Also, one thought on your sampling problem. If the signal
changes you are interested in are sporadic, you might have
the mote detect them and only transmit when there is some
thing of interest.
MS
siva prasad wrote:
hi...sorry to bother u again...
why in Delta application ..the "enum"....AM_DELTAMSG is initialised to 33;
can any body pls explain....
On 8/30/06, *Michael Schippling* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Keptin, I kenna change th'laws o'physics...
siva prasad wrote:
> again thanks for tht explanation...i can understand tht problem...
> As i told previously, my system is highly dynamic in nature...in
order
> to monitor such dynamical system is there any better idea...not like
> sending 10 readings in one packet after 10ms...
>
> thanks in advance...
>
> siva katru
>
> On 8/30/06, *Michael Schippling* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
> <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>> wrote:
>
> As I said, based on my (small) experience with micaz I believe
> that 100 messages per second is about the max you can expect.
> And that 100 is for the total system, not per mote (unless of
> course you have only one mote transmitting). If you are doing
> multihop then you need to divide the total messages by the
> number of hops (each hop being it's own message) to get even
> a best case estimate -- ignoring hidden nodes and any other
> actual practical considerations.
>
> So the only way I see to get your higher sample rate is to
> aggregate samples, say 10 per message. You would need to
> do some testing in various configurations to see how many
> messages you can get...let's say, the source and two hops gives
> you best case 30 msg/sec, with 10 samples/msg, is 300
samples/sec.
>
> Nobody said that motes were a High Speed sensor network...
> MS
>
>
> siva prasad wrote:
> > thanks for ur reply michael,
> >
> > if i sample the signal at 1ms(suppose for 50hz signal)
then it
> will be
> > better ...that is required for my application ...one more
thing
> is that,
> > the system tht i want to monitor is highly dynamic in
nature..so the
> > data should be send for every 1ms...i think 1ms is
sufficient for
> just
> > measuring the external ADC value..and sending this value using
> > multihop(must) technique...
> > But the problem is..... i am losing lot of packets abt 50%
even
> for the
> > sampling period at 10 ms....do u hav any different idea tht
> ...how can i
> > overcome this problem....
> > any help should be highly appreciated...
> >
> > if we cant sample and send(using multihop) the data in 1ms
...pls
> give
> > the reason...
> >
> > still i did nt clear my old doubts...
> >
> >
> > On 8/30/06, *Michael Schippling* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
> <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
> > <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
<mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>>> wrote:
> >
> > I don't know the message rate you can expect from
moteiv motes
> > but if you are trying to send one sample every 10ms
you are
> > probably pretty close to the limit (somewhere on the
order of
> > 100 msg/sec is the max for micaz's). You'll probably
need to
> > collect multiple samples in one message to get anywhere at
> 30Hz...
> >
> > Let me know if you need clarification one answers to
your other
> > questions.
> > MS
> >
> >
> > siva prasad wrote:
> > >
> > >
> > > From: *siva prasad* < [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
> <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
> > <mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> <mailto: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> >
> <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
<mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
> > <mailto: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> <mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>>>>
> > > Date: Aug 28, 2006 12:52 AM
> > > Subject: Delta application -help required
> > > To: tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>
> <mailto:tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>>
> > <mailto: tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>
> <mailto:tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>>>
> > > <mailto: tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>
> <mailto: tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>>
> > <mailto: tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>
> <mailto: tinyos-help@millennium.berkeley.edu
<mailto:tinyos-help@millennium.berkeley.edu>>>>
> > >
> > > hi all...
> > >
> > > i am working on sampling the ADC value instead of
> > DEmosensorc...in the
> > > delta application provided by moteiv.....
> > >
> > > i am glad to say tht ..i hav successfully compiled
it ...
> > > and installed..it worked...
> > > the problem is when i tried to undrstand the
program..i am
> facing
> > some
> > > difficulties....
> > >
> > > -> i could nt understand the task..named...sendDone( )
> > >
> > > -> while i tried to see the raw data using listen
> tool...it is
> > showing
> > > 42 bytes...but i could nt figured out the data format..
> > >
> > > ->one more problem is...the signal tht i want to
sample is
> a low
> > > frequency signal..abt 30Hz...
> > > if i increase the sampling time to 10ms ..i am
losing
> lots of
> > packets...
> > >
> > > can any body pls help me...
> > >
> > > thanks
> > >
> > > siva katru
> > >
> > >
> > >
> >
>
------------------------------------------------------------------------
> > >
> > > _______________________________________________
> > > Tinyos-help mailing list
> > > Tinyos-help@Millennium.Berkeley.EDU
<mailto:Tinyos-help@Millennium.Berkeley.EDU>
> <mailto: Tinyos-help@Millennium.Berkeley.EDU
<mailto:Tinyos-help@Millennium.Berkeley.EDU>>
> > <mailto: Tinyos-help@Millennium.Berkeley.EDU
<mailto:Tinyos-help@Millennium.Berkeley.EDU>
> <mailto: Tinyos-help@Millennium.Berkeley.EDU
<mailto:Tinyos-help@Millennium.Berkeley.EDU>>>
> > >
> >
>
https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
<https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help>
>
<https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help>
> >
> >
>
>
_______________________________________________
Tinyos-help mailing list
Tinyos-help@Millennium.Berkeley.EDU
https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
